1 The body produces too much cortisol hormone by itself (known as âendogenousâ Cushingâs syndrome).  A person takes large amounts of steroid medication to treat conditions such as asthma, rheumatoid arthritis or eczema. This is known as âexogenousâ Cushingâs syndrome.
Deficiency. A shortage or insufficiency. The amount by which federal Income Tax due exceeds the amount reported by the taxpayer on his or her return; also, the amount owed by a taxpayer who has not filed a return.
The Definition of Vitamin D Deficiency. Defining what is a healthy level of vitamin D is not crystal clear. A level lower than 20 nanograms per milliliter (ng/ml) is generally accepted as a deficiency and levels less than 10 ng/ml need further evaluation to determine the cause.